Patent US3943391A successfully refreshed from Google Patents.
US3943391A
Expired / Lapsed
US
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Electromagnetic coupler having an electromagnetic winding
Assignee: Sulzer AG
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Filing: 1973-10-11
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Granted: 1976-03-09
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Expires: 1993-10-11
Abstract
Abstract The electromagnetic winding is made up of a plurality of insulated coils which are formed by a wound-up sheet metal strip. The strip is of a material having high magnetic permeability so that the coils eliminate the need for a magnetic core. The coils can be insulated from each other by a wound strip of insulating material such as paper or by means of a synthetic lacquer. The electromagnetic coupler can be of the synchronous or asynchronous type and can be in the form of a clutch or brake.
Inventors
- 👤 Henri Fehr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:09
CPC Classifications
H; H01; H01F; H01F7/00; H01F7/06; H01F7/20; H01F7/206; H01F5/00; H01F7/08; H02; H02K; H02K3/00; H02K3/04; H02K3/18; H02K49/00; H02K49/06
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
162 words
An electromagnetic coupler comprising a housing defining part of an excitable magnetic circuit having an air-gap therein and a solid magnetizable core of said circuit; a drive shaft rotatably mounted in said housing; a rotor fixedly mounted on said shaft; a single ring of poles mounted on said rotor and disposed in said air-gap; a driven shaft spaced from said first shaft; a second rotor fixedly mounted on said driven shaft; a single ring of poles mounted on said second rotor and disposed about said first ring of poles; a substantially annular excitation winding disposed concentrically about said drive shaft and said core, said winding having a plurality of coils disposed in insulated manner with respect to each other, said coils being of a magnetically highly permeable strip material to form at least a part of said magnetizable core of said magnetic circuit with said winding being magnetizable in a longitudinal direction thereof; and a non-magnetizable part-winding concentrically about said excitation winding.
Claim 2
Dependent Claim
162 words
An electromagnetic coupler comprising a housing defining part of an excitable magnetic circuit having an air-gap therein and a solid magnetizable core of said circuit; a drive shaft rotatably mounted in said housing; a rotor fixedly mounted on said shaft; a single ring of poles mounted on said rotor and disposed in said air-gap; a driven shaft spaced from said first shaft; a second rotor fixedly mounted on said driven shaft; a single ring of poles mounted on said second rotor and disposed about said first ring of poles; a substantially annular excitation winding disposed concentrically about said drive shaft and said core, said winding having a plurality of coils disposed in insulated manner with respect to each other, said coils being of a magnetically highly permeable strip material to form at least a part of said magnetizable core of said magnetic circuit with said winding being magnetizable in a longitudinal direction thereof; and a non-magnetizable part-winding concentrically about said excitation winding.
Claim 3
Dependent Claim
120 words
An electromagnetic coupler comprising a housing defining part of an excitable magnetic circuit having an air-gap therein; at least one shaft rotatably mounted in said housing; a rotor fixedly mounted on said shaft; and a plurality of substantially annular excitation windings distributed annularly about said rotor to form at least a part of a ring of poles thereof in said air gap, each said winding being divided into two part-windings with the inner windings having coils disposed in insulated manner with respect to each other, said coils being of a magnetically highly permeable strip material to form at least a part of a magnetizable core of said magnetic circuit with each said winding being magnetizable in a longitudinal direction thereof.
Claim 4
Dependent Claim
120 words
An electromagnetic coupler comprising a housing defining part of an excitable magnetic circuit having an air-gap therein; at least one shaft rotatably mounted in said housing; a rotor fixedly mounted on said shaft; and a plurality of substantially annular excitation windings distributed annularly about said rotor to form at least a part of a ring of poles thereof in said air gap, each said winding being divided into two part-windings with the inner windings having coils disposed in insulated manner with respect to each other, said coils being of a magnetically highly permeable strip material to form at least a part of a magnetizable core of said magnetic circuit with each said winding being magnetizable in a longitudinal direction thereof.
Claim 5
Dependent Claim
115 words
An electromagnetic coupler comprising a housing defining part of an excitable magnetic circuit having an air-gap therein; a shaft rotatably mounted in said housing; a rotor fixedly mounted on said shaft; a ring of poles mounted on said rotor and disposed in said air-gap; and a substantially annular excitation winding disposed concentrically about said shaft, said winding having an inner part-winding and an outer part-winding surrounding said inner part-winding, said outer part winding being made of non-magnetizable highly-conductive material and said inner-part winding being of a magnetically highly permeable strip material to form at least a part of a magnetizable core of said magnetic circuit with said winding being magnetizable in a longitudinal direction thereof.
Claim 6
Dependent Claim
115 words
An electromagnetic coupler comprising a housing defining part of an excitable magnetic circuit having an air-gap therein; a shaft rotatably mounted in said housing; a rotor fixedly mounted on said shaft; a ring of poles mounted on said rotor and disposed in said air-gap; and a substantially annular excitation winding disposed concentrically about said shaft, said winding having an inner part-winding and an outer part-winding surrounding said inner part-winding, said outer part winding being made of non-magnetizable highly-conductive material and said inner-part winding being of a magnetically highly permeable strip material to form at least a part of a magnetizable core of said magnetic circuit with said winding being magnetizable in a longitudinal direction thereof.
Claim 7
Dependent Claim
120 words
An electromagnetic coupler comprising a housing defining part of an excitable magnetic circuit having an air-gap therein; a shaft rotatably mounted in said housing; a rotor fixedly mounted on said shaft; a ring of poles mounted on said rotor and disposed in said air-gap; a substantially annular excitation winding disposed concentrically about said shaft, said winding having a plurality of coils disposed in insulated manner with respect to each other, said coils being of a magnetically highly permeable strip material to form at least a part of a magnetizable core of said magnetic circuit with said winding being magnetizable in a longitudinal direction thereof; and at least one short-circuit winding on each pole-shoe of a stator formed by said housing.
Claim 8
Dependent Claim
120 words
An electromagnetic coupler comprising a housing defining part of an excitable magnetic circuit having an air-gap therein; a shaft rotatably mounted in said housing; a rotor fixedly mounted on said shaft; a ring of poles mounted on said rotor and disposed in said air-gap; a substantially annular excitation winding disposed concentrically about said shaft, said winding having a plurality of coils disposed in insulated manner with respect to each other, said coils being of a magnetically highly permeable strip material to form at least a part of a magnetizable core of said magnetic circuit with said winding being magnetizable in a longitudinal direction thereof; and at least one short-circuit winding on each pole-shoe of a stator formed by said housing.
Claim 9
Dependent Claim
174 words
An electromagnetic coupler comprising a housing defining a stator part of an excitable magnetic circuit having an air-gap therein and pole shoes; a shaft rotatably mounted in said housing; a rotor fixedly mounted on said shaft; a ring of poles mounted on said rotor and disposed in said air-gap; a substantially annular excitation winding disposed concentrically about said shaft, said winding having a plurality of coils disposed in insulated manner with respect to each other, said coils being of a magnetically highly permeable strip material to form at least a part of a magnetizable core of said magnetic circuit with said winding being magnetizable in a longitudinal direction thereof; a driven shaft coaxially spaced from said first shaft; a second rotor fixedly mounted on said driven shaft; and a ring of poles mounted on said second rotor and disposed in said air-gap to divide said air-gap into a three part air-gap with said first ring of poles, and wherein said pole-shoes of said stator formed by said housing have smooth surfaces opposite said air-gap.
Claim 10
Dependent Claim
174 words
An electromagnetic coupler comprising a housing defining a stator part of an excitable magnetic circuit having an air-gap therein and pole shoes; a shaft rotatably mounted in said housing; a rotor fixedly mounted on said shaft; a ring of poles mounted on said rotor and disposed in said air-gap; a substantially annular excitation winding disposed concentrically about said shaft, said winding having a plurality of coils disposed in insulated manner with respect to each other, said coils being of a magnetically highly permeable strip material to form at least a part of a magnetizable core of said magnetic circuit with said winding being magnetizable in a longitudinal direction thereof; a driven shaft coaxially spaced from said first shaft; a second rotor fixedly mounted on said driven shaft; and a ring of poles mounted on said second rotor and disposed in said air-gap to divide said air-gap into a three part air-gap with said first ring of poles, and wherein said pole-shoes of said stator formed by said housing have smooth surfaces opposite said air-gap.
Claim 11
Dependent Claim
118 words
An electromagnetic coupler comprising a housing defining part of an excitable magnetic circuit having an air-gap therein; a shaft rotatably mounted in said housing; a rotor fixedly mounted on said shaft; a ring of poles mounted on said rotor and disposed in said air-gap; a substantially annular excitation winding disposed concentrically about said shaft, said winding having a plurality of coils disposed in insulated manner with respect to each other, said coils being of a magnetically highly permeable strip material to form at least a part of a magnetizable core of said magnetic circuit with said winding being magnetizable in a longitudinal direction thereof; and a solid piece of magnetically permeable material forming a part of said core.
Claim 12
Dependent Claim
118 words
An electromagnetic coupler comprising a housing defining part of an excitable magnetic circuit having an air-gap therein; a shaft rotatably mounted in said housing; a rotor fixedly mounted on said shaft; a ring of poles mounted on said rotor and disposed in said air-gap; a substantially annular excitation winding disposed concentrically about said shaft, said winding having a plurality of coils disposed in insulated manner with respect to each other, said coils being of a magnetically highly permeable strip material to form at least a part of a magnetizable core of said magnetic circuit with said winding being magnetizable in a longitudinal direction thereof; and a solid piece of magnetically permeable material forming a part of said core.
Claim 13
Dependent Claim
123 words
An electromagnetic coupler comprising a housing defining part of an excitable magnetic circuit having an air-gap therein; a shaft rotatably mounted in said housing; a rotor fixedly mounted on said shaft; a ring of poles mounted on said rotor and disposed in said air-gap; at least one short-circuit winding mounted in said housing about said ring of poles to define stator poles; and a substantially annular excitation winding disposed concentrically about said shaft, said winding having a plurality of coils disposed in insulated manner with respect to each other, said coils being of a magnetically highly permeable strip material to form at least a part of a magnetizable core of said magnetic circuit with said winding being magnetizable in a longitudinal direction thereof.
Claim 14
Dependent Claim
123 words
An electromagnetic coupler comprising a housing defining part of an excitable magnetic circuit having an air-gap therein; a shaft rotatably mounted in said housing; a rotor fixedly mounted on said shaft; a ring of poles mounted on said rotor and disposed in said air-gap; at least one short-circuit winding mounted in said housing about said ring of poles to define stator poles; and a substantially annular excitation winding disposed concentrically about said shaft, said winding having a plurality of coils disposed in insulated manner with respect to each other, said coils being of a magnetically highly permeable strip material to form at least a part of a magnetizable core of said magnetic circuit with said winding being magnetizable in a longitudinal direction thereof.
References Cited (Backward Citations)
US1877569A
Cited
US2488827A
Cited
US2447130A
Cited
US2603678A
Cited
US2583124A
Cited
US2807734A
Cited
US3012160A
Cited
US3230405A
Cited
US3047754A
Cited
US3247476A
Cited
US3283188A
Cited
US3417271A
Cited
US3549921A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-03-09 | 1979-09-08 | 1980-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-09 | 1983-09-08 | 1984-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-09 | 1987-09-08 | 1988-03-09 | $7700.00 | Window Closed / Lapsed |